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Message: <blockquote data-quote="CobraEd" data-source="post: 1496478" data-attributes="member: 24078"><p>That is part of the air injection system which hooks up to the smog pump.  It is tied into a tube which crosses over between the backs of the two cylinder heads.  Since you have AFR smog legal heads, they have ports on the back of each head for that crossover tube connection.  There may also be a tube that runs back to the cats.  The metal tubes & hoses in the upper right corner are part of the air injection system.  I do not have the smog pump itself in the pic.  These are off of my carbureted 85 GT but would be similar on injected models of later years.[ATTACH=full]14918[/ATTACH][ATTACH=full]14918[/ATTACH]</p></blockquote><p></p>